I have been at several air conditioning shops and they say that R134 is on its way out. New cars with it go about 4 to 5 years. Then it is so expensive to replace the items, the customers just sell their vehicle. I just redid my 61 LeBaron with R-12. It still works so fine. I had trouble with the high side gasket that I kept testing different things. I finally found a cure. It works even with a warped fitting when bolting the front high pressure port on the compressor. I used just an o-ring from the the expansion valve. It is blue and is available thru NAPA. It has been running now with no loss for two months. As some of you know, I live in Palm Desert, Calif where it is constantly hot and will be thru the early part of October. I got a flier from Tuscon where I might take the 61 Imperial for a show then. It is a show and swap at Pima College, West Campus on November 2 & 3. For those interested, the #'s are 520 293 3178, Lou. Or, Juanita @ 520 887 7767, 6-9pm. Thats it for now and happy Imperialin, I know I do, a lot, Joe Machado